A system and method for facilitating decision making on a watercraft, such as a ship or boat, comprises processors configured to acquire environmental data comprising measurements of one or more parameters of an environment in a locality of the watercraft. A plurality of digital models are provided, each model modelling an effect of the environment on a respective capability of the watercraft, with each capability of the watercraft being assigned to one or more watercraft actions, or related entity actions. The environmental data and the models are used to model an effect of the environment on the capabilities of the watercraft. The processors receive a selection of an action and using outputs of each model that models a capability that is assigned to the selected action, determine a risk assessment for the selected action. The user or operator of the watercraft can then decide whether or not to carry out the action based upon the output risk assessment. The action may relate to the task of launching an auxiliary boat from the watercraft, with the models being used to determine the impact of the environmental conditions on the watercraft systems required for successful and safe launch of the auxiliary boat.
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